Microsoft's original logo was replaced in 1975 after a short shelf life.

Microsoft's previous logo was apparently good enough for 25 years of service - debuting in 1987.

Obviously the use of logos are of vital interest to a company. Here are just a few of Microsoft's guidelines for using this logo:

The Logo must always be at least 60 pixels in width.

The Logo must appear only in a horizontal position.

The Logo must stand alone and may not be combined with any other object, including but not limited to other logos, words, graphics, photos, slogans, numbers, design features, or symbols. The Logo must never be used to represent the word "Microsoft" in text, including in a headline, product-name logotype, or body copy.

Microsoft's second logo ruled until 1987.

The new logo adopts the four-color design and shape of the Windows logos.

Although Windows 95 looks up into the cloud. A sign of the future or just lucky?

Microsoft stores are carrying their own version of the logo.

Here is Microsoft Chief Marketing Officer Chris Capossela unveiling the logo as he opens the Microsoft Store in Boston on August 23rd.

One of Microsoft best known logos, and one of their better ones, has appeared on the Xbox 360 since 2010.

Interesting how the Windows icon became part of the corporate logo while the new version of windows, Windows 8, dropped it.

Internet Explorer used to use the four-color Microsoft logo but has been redesigned to only feature the "e".